/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.causality;

import static java.util.concurrent.CompletableFuture.allOf;

import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CopyOnWriteArrayList;

/** Implementation for tests. */
public class TestRevisionListenerRegistry implements RevisionListenerRegistry {
    private final List<RevisionListener> listeners = new CopyOnWriteArrayList<>();

    @Override
    public void listen(RevisionListener listener) {
        listeners.add(listener);
    }

    /** Updates revision. */
    public CompletableFuture<Void> updateRevision(long revision) {
        CompletableFuture<?>[] futures = listeners.stream()
                .map(m -> m.onUpdate(revision))
                .toArray(CompletableFuture[]::new);

        return allOf(futures);
    }

    /** Deletes revisions. */
    public void deleteRevisions(long revisionUpperBoundInclusive) {
        listeners.forEach(listener -> listener.onDelete(revisionUpperBoundInclusive));
    }
}
